Salt-making machinery.



P. L. CLIFTON.

SALT MAKING MACHINERY.

APPLIoATlon FILED un. as. 190s.

Patentd Nov. 10, 1908..

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PEARL L. CLIFTON, 0F POMEROY, OHIO, ASSIGNOR TO THE POMEROY SALT ASSOCIATION COMPANY, OF POMEROY, OHIO, A CORPORATION -OF OHIO.

SALT-MAKING MACHINERY.

Sp ecination of Letters Patent. Application led April 25, 190B. Serial No, 813,534.

fietspad Nov. 1o, 190e.-

manufacture of salt from natural salt brine.

The object of my invention is to simplify and cheapenthe manufacture-of salt 4and to lmrove'its quality.

y invention consists in a closed evapo-- rator means for admttiV salt brine therein and discharging it 'there m and having a steam space therein above said salt brine, a steam coil in said closed evaporator ada ted to be immersed in the salt brine to produce eva ration, means for supplying steam to sai steam coil, an exhaust for said steam coil, and sufficient means for reel eXhaust-' in the steainformedfrom the brine to peri mit the steam bein and readily release `rom the brine. A My invention also consists in the' details ofy construction andl in the parts, combinationand arrangement of parts as herein set forth' and claimed.

4In the drawings, which serve to illustrate the construction and arrangement of my invention: Figure 1 is a diagrammatic plan view showing the location and arrangement of my invention with reference to the' other arts of a salt making plant. Fi 2 is an enaiged longitudinal section oft e end porvarious pipes in full lines, fthe center. ing broken away for lack of space. Fi 3 is a vertical section on the line -a: o Fig'. 2, showing the pipes in elevation. Fig. 4 is a diagrammatic View of my invention and the other parts of a salt making plant in relation thereto. Fig. 5 is a side elevation of the ncrator.

The construction and operation of a salt making ilant according to my invention is referably substantially as follows: A sal't irine tank 1 of an suitable construction cylindrical in form and having an open top and a discharge outlet 2 near its bottom is adapted to be supplied with natural s altbrine pumped from wells, such as 3, 4 and 5, by means of -an air compressnr 6 having suitable connection withv enerated to be rapidly said wellg and said wells being rovided 'into said tank. Said salt brine tank 1 is provided with an aerator 7 placed adjacent the dischargeoutlet 2 communi'catin with said air compressor and is provide with aerate the brine to oxidize iron therein. before it is discharged from the salt brine tank.

A heater 9 comprising an open to receptacle for the brine through the disc arge outlet 2 4.is arranged near the salt brine .steamcoils 10 distributed therein and adapted to be supplied with exhaust steam from the air compressor for the purpose of heating brine in which said coils are immersed from aboutO degrees F. to about'. 180 dehe air compressor 6 is supplied with steam ipe 13. The brine is conveyed rom the heater 9 into a closed evaporator 14 by means of a' brine tube 15 which extends from near the top of the heater to near the .bottom of the closed evaporator. The closed eva oratorV is provided in its lower part with a series of steam coils 16 secured in and communicating with a manifold 17 at one `end and 18 at the other and supplied with ylive steam' from boiler 19 throu pipe 20 which steam is adapted to circulate throu h said `,series of coils which are iinmerse ,in the brine to heat the same toa high degree o f temperature for the pur o se of generating steam which is collecte .in the steam space 21, to oxidize the remaining iron in the brine, to increasethe specific gravity of the unevaporated brine and to b'e exhausted through discharge or exhaust ipe 22 into a steam trapor condenser 23 rom which the condensation is returned to the water tube 24 for continuous use.

l The salt brine in the closed evaporator is conveyed to a filter 2 5 or 26 Where the oxidized iron and other ingredients deleterious tothe salt are mechanically separated from the salt brine which is cnveyed therefrom through pipes 27 to open evaporators 28 where it is heated by the exhaust steam generated from the salt brine in the closed evaporator 14, the same being conveyed. Vhv steam .with pipes {ii'ot shown) to convey t e brine perfortions 8 to distribute Aand thoroughly` tank 1. Thisheater 9 is provided with.

grecs F. to oxidize iron inthe brine and to 4 prepare the brine for further treatment.-

from the boilers 11 and 12 tlirou h steam gh steam boiler in the formofhot water through hot in use and vice versa thus 'specific pipe 29 to steam coils 30 immersed in the rine and provided with a discharge outlet or exhaust pipe 31 through which the condensed steam is exhausted into a suitable condensing tank 32 from whichl it ma be pum ed into the feedin tank 33, as 1ndcate by dotted line. T iis feeding tank 33 is a fresh water storage tank for boiler feed pur oses.

e brine in the open evaporator is sixnultaneously heated and aerated until the proper gravity of the brinel is obtained. It is then conveyed into ainers 34 comprising open receptacles w ich are sup lied with steam coils 35 suspended therein a ove the bottom of each grainer and which are sup veyed by steam plipe 36 into said grainers where it passes t rough the steam coils 35 and heats the brine sufliciently' to reci itate the salt therein, the steam in t e coils condensing and passing into the condensing tank 32. Each grainer is preferably provided with an endless carrier adapted to en'- gage the inner bottom surface from end to end and draw the salt as it precipitates up inclines 37 to a draining room 38 where the salt is deposited and drained in the usual way.

l have shown filters 25 and 26 respectively and prefer to use then alternately in order that one may be cleaned while the other is avoiding any interruption in the operation. It' desired, however, one filter only may be used. The

salt is conveyed from the draining room to a storeroom where it is allowed to remain until sufiiciently dry to be in condition for shipment in barrels or otherwise as desired.

The construction and arrangement of machinery employed herein for .the manufacture of salt according to my invention is such as to economize in the use of fuel because ractically all of the heat units are utilized and preserved for continuous use in some form. Considerable apparatus is also dispensed with such as settlingtanks,

place of four settlln r tanks which were formerly used. Less uel is required to produce the necessary heat for operating the plant. An inferior and Acheaper grade of fuel used in the boilers to producethe steam accomplishes better results than a superior and more expensive grade of fuel used in a furnace to furnish direct h eat to evaporating pans. The quantity of fuel being less and other machinery heretofore operated be-v ing dispensed with there is also a saving'in labor by the use of my machinery. The combined use of the aerator, heater, closed evaporator and filter to purify the brine increases its density more rapidly and effects a sa ving of time "which increases the capacplied with steam generated from the brine 1n the closed evaporator 14 and con-l ity of the plant correspondingly and enables a much larger volume of salt to he |noih|ecd 1n a given time.

Itwill beapparent that changes in the particular construction and arrangement of my machinery may be made Without material departure from the scope and spirit of the invention.

I claim:

1. A salt making apparatus comprising a salt brine tank having a discharge outlet near the bottom, an aerator in said tank adjacent said outlet, an open heater ada ted to receive the aerated brinefrom sai tank, steam coils in said open heater adapted to heat said aerated brine to a given degree of temperature, a closed evaporator below the plane of said heater and a brine space there- '1n comprising substantially the lower half of said evaporator, a brine tube extending fromnear the top of said open heater to near the bottom of said closed evaporator, a steam coil arranged within said brine space and immersed within the brine therein, a live steam pipe communicatin therewith and an exhaust or discharge pipe eading therefrom, a brine outlet-in said closedevaporator, at the brine line, a filter below the plane of said closed evaporator, a brine tube extending fromsaid brine outlet to said filter-adapted to convey the brine from said evaporator tosaid filter, an open evaporator beloiv the plane of said lter, a brine pipe adapted to convey the brine from said filter to said open evaporator, a gra-iner below the plane of said open evaporator, abr-ine tube adapted to convey the brine `from said open evaporator to said gra-incr, steam coils in said onen evaporator and grainer, respectively, and

steam pipes adapted to carry steam from the top of said steam space in the closed evaporator to the steam coils in said open evaporator and "rainer, respectivel substantially as and li'or the purpose set orth.

2. A salt making apparatus comprising a salt brine tank having a discharge outlet, an ucrator adjacent said outlet, an open top heater adapted to receive aerated brine from said outlet, a closed evaporator having a ln-ine space adapted to receive brine from said heater and having Va steam space above said. brine space, a filter adapted to receive brine from sald-v closed evaporator, an open evaporator adapted to receive brine from said filter, a grainer adapted to receive brine from said open evaporator,.a steam'coil immersed in the brine in said closed evaporator, means for passing live steam therethrough to generate steam from the salt brine and release samein said steam space without exerting pressure on said brine, exhaustmeaiis for said steam coil and means for caurying the steamv from sa1d steam space into c oilsl in' the open evaporator and grarner, sub-v stantially as turd for the purposes ser, forth,

massa 'f n evaporator 2,87' ipe' 27 opl? from saidilP4 y l'ine terin to said o n evaporator, a grainer, a brine tube exten ing from theV open eva orator to said `grainer, a' steampipe 29 an a steam pige '36 communicating with steam coils 30 in t e `115 evaporators and steam coils 35111 the grainers respectivelv, substantially as and for the vpurposes set forth'.

v PEARL L; CLIFTON- Witnesses: f

H. P. COLLINS, JAMEs N. RAMSEY. 

